Navigation Links
Underwater, Humans Hear Through Their Bones
Date:5/24/2011

By Jenifer Goodwin
HealthDay Reporter

TUESDAY, May 24 (HealthDay News) -- Humans possess the ability to hear far higher pitched sounds when underwater than they can while on terra firma.

How can they do it? By "hearing" with their bones rather than through the normal pathways of hearing, U.S. Navy researchers report.

The way in which humans hear above or below water differs; that difference means they only hear between 20 and 20,000 hertz through the air, while they can catch sounds all the way up to 200,000 hertz when submerged.

On land, humans hear through air conduction. Sound pressure waves cause tiny disturbances in the air that travel into the ear canal and vibrate the ear drum, which is connected to the three smallest bones in the body, the ossicles of the middle ear.

The ossicles are connected to the cochlea, which is filled with fluid and contains "hair cells," or tiny protrusions that also move, stimulating the auditory nerve, which sends signals to the brain.

"Human hearing is magnificent," said Bill Martin, a hearing scientist at the Oregon Hearing Research Center in Portland. "The ear drum only has to move less than the diameter of a hydrogen atom for us to perceive sound."

The cochlea, too, is complex. Similar to a rolled up piano keyboard, portions of the cochlea are responsible for hearing specific frequencies that help humans differentiate between, say, a bird tweeting and a garbage truck.

But underwater, humans don't hear using the normal channels. Instead, the study found that humans hear through bone conduction, which bypasses the outer ear and the ossicles of the middle ear.

Instead, sound comes through the mastoid, or the bone you can feel if you put your fingers behind the ear.

"By using bone conduction, the human ear can actually receive sounds at frequencies way higher than most people would have expected," Martin explained.

While expert
'/>"/>

Copyright©2010 ScoutNews,LLC.
All rights reserved  

Page: 1 2 3

Related medicine news :

1. New drug for kidney transplant recipients effective in humans
2. Dolphins May Warn of Health Risks in Humans
3. Humans Tree-Dwelling Ancestors May Have Also Walked Upright
4. Tiny Fish Might Help Humans Fix Damaged Hearts
5. McGill-UBC project creates mouse grimace scale to help identify pain in humans and animals
6. Caring for Diabetic Pets Helps Humans Get Healthier
7. Hallmark Alzheimers disease changes found in retinas of humans and imaged in live animals
8. Cancer-metabolism link runs deep in humans
9. Plant compound resveratrol shown to suppresses inflammation, free radicals in humans
10. Scientists develop the first model for investigating the origins of testicular cancer in humans
11. Scientists find link in humans between nerve cell production, memory
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Underwater, Humans Hear Through Their Bones 
(Date:1/22/2015)... A study recently published in ... Medicine & Science in Sports & Exercise shows ... reduce gastrointestinal (GI) problems associated with physical strain ... the double-blind, placebo-controlled study took 10 grams of ...
(Date:1/22/2015)... Recently, Weddingshe.com has added many trendy ... its highest annual revenues in the past three years. Today, ... wedding dresses. , According to the sales manager of the ... for them in 2015. This point can be reflected on ...
(Date:1/22/2015)... January 22, 2015 Four years since the release ... which coincided with the marriage of Avasa & Matthew Love – ... which is scheduled for release through White Swan Records on February ... there is a sacred path available to all of us to ...
(Date:1/22/2015)... EBSCO Information Services (EBSCO) and the American ... effort to further promote visibility and adoption of the top ... AMA journals available via its subscription services, EBSCO will now ... , Long known as both a subscription agency and ...
(Date:1/22/2015)... a famous dress online store for wedding dresses and other ... of wedding dresses , and launches a site-wide women’s dress ... on your big day; the wedding gown is the most ... find the most suitable wedding dress. Now, we are proud ...
Breaking Medicine News(10 mins):Health News:Study Shows Kyowa Hakko’s L-Citrulline May Help Reduce Gastrointestinal Injury During Strenuous Exercise 2Health News:Study Shows Kyowa Hakko’s L-Citrulline May Help Reduce Gastrointestinal Injury During Strenuous Exercise 3Health News:Weddingshe Announces A Special Offer On Its Popular Glamorous Wedding Dresses 2Health News:THE ROAD by Avasa & Matthew Love -- A New Album 2Health News:THE ROAD by Avasa & Matthew Love -- A New Album 3Health News:THE ROAD by Avasa & Matthew Love -- A New Album 4Health News:EBSCO Expands Partnership with the American Medical Association 2Health News:EBSCO Expands Partnership with the American Medical Association 3Health News:EBSCO Expands Partnership with the American Medical Association 4Health News:Find The Most Suitable Wedding Dress At JJsHouse.com 2
... medicine is projected to increase// to more than 4,474 ... ,With the addition of COM Mesa of ... the Debusk College of Osteopathic Medicine of Lincoln Memorial ... Osteopathic Medicine in New York City, a new wave ...
... ‘eatable’ portions of watercress every day, may reduce the risks of ... from the University of Ulster, conducted a study published in the ... 30 men and 30 women, out of which 30 were smokers. ... popular leafy vegetable used in salads, to eat daily, once, for ...
... women may be unknowingly harming their babies if they follow ... , Published in the Lancet by researchers Joseph ... from Bristol University, the study results point out that fish ... pregnant women. ,The U.S Government and British Food ...
... plastics found in food storage containers and dental products—can ... recent study by Yale School of Medicine researchers. ... professor in the Department of Obstetrics, Gynecology & Reproductive ... BPA changes the expression of key developmental genes that ...
... pain, nausea, agitation and sweats motivate addicts to ... study suggest new approaches to reduce withdrawal symptoms. ... the brain's stress-response mechanism exacerbates behavioral withdrawal symptoms ... hormone corticosterone alleviates those symptoms. ,Angelo ...
... on an ultrasonic machine in an Iowa State University laboratory. ... a mixture of soy flakes and cold water. And that ... the food industry. ,Adding ultrasonic pretreatment to ... can be added to foods, said Samir Khanal, an Iowa ...
Cached Medicine News:Health News:Osteopathic Medical Education Will Help With Shortages 2Health News:Pregnant Women Must Eat Fish-experts Warn 2Health News:A New Approach to Manage Opiate Addiction 2Health News:Researchers Improve Soy Processing by Boosting Protein and Sugar Yields 2
(Date:1/23/2015)... Africa , Jan. 23, 2015   Leatt Corporation ... personal protective equipment for all forms of sports, including ... Leatt-Brace® neck brace, announced today that the UISP Lega ... now requires all riders to wear a neck brace ...
(Date:1/23/2015)... 23, 2015 Tianyin Pharmaceutical Inc. (NYSE Amex: ... the development and sale of patented biopharmaceutical medicine, modernized ... ingredients (API) today announced the business and development progress ... 1. Following the September 2014 JCM application (No. ...
(Date:1/22/2015)... WOODBRIDGE, ON , Jan. 22, 2015 /PRNewswire/ - Pivotal Therapeutics ... company with a focus on Omega-3 therapies for cardiovascular disease ... summary of the Company,s accomplishments in 2014 and its outlook ... Dear Fellow Shareholders, We would like ...
Breaking Medicine Technology:Leatt Announces Neck Braces Now Required For Motocross/Minicross Racing In Italy 2Leatt Announces Neck Braces Now Required For Motocross/Minicross Racing In Italy 3TPI's JCM Updates on Import Registration for International Clients 2TPI's JCM Updates on Import Registration for International Clients 3TPI's JCM Updates on Import Registration for International Clients 4Pivotal Therapeutics: Year in Review and CEO Update 2Pivotal Therapeutics: Year in Review and CEO Update 3Pivotal Therapeutics: Year in Review and CEO Update 4Pivotal Therapeutics: Year in Review and CEO Update 5Pivotal Therapeutics: Year in Review and CEO Update 6Pivotal Therapeutics: Year in Review and CEO Update 7
... is the ideal hemostatic gauze for a variety ... gauze, BloodSTOP iX is easy to handle and ... reach bleeding sites that are often a challenge ... can be used to control bleeding in outpatient ...
Sharp tipped straight scissors. For cutting in the iris plane or cutting peripheral membranes. May also be useful in ROP cases....
Microscissors : Horizontal Scissors...
Low profile, sharp-tipped scissors with a vertical cutting action. Excellent for peeling and cutting fine epiretinal membranes....
Medicine Products: